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OMAP3530ECBBA 数据表(PDF) 184 Page - Texas Instruments |
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OMAP3530ECBBA 数据表(HTML) 184 Page - Texas Instruments |
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184 / 265 page  A1 A1 E0 T E1 T E2 OMAP E3 T T OMAP3530, OMAP3525 SPRS507H – FEBRUARY 2008 – REVISED OCTOBER 2013 www.ti.com Figure 6-22 shows the topology and routing for the DQS and DQ net classes; the routes are point to point. Skew matching across bytes is not needed nor recommended. Figure 6-22. DQS and DQ Routing and Topology Table 6-21. DQS and DQ Routing Specification(1) NO. PARAMETER MIN TYP MAX UNIT NOTES 2 DQS E Skew Length Mismatch 25 Mils Center to Center DQS to other LPDDR 3 4w See Note(2) trace spacing 4 DQS/DQ nominal trace length DQLM - 50 DQLM DQLM + 50 Mils See Note(3) 5 DQ to DQS Skew Length Mismatch 100 Mils 6 DQ to DQ Skew Length Mismatch 100 Mils Center to Center DQ to other LPDDR 7 4w See Note(2) trace spacing Center to Center DQ to other DQ trace 8 3w See Note(2),(4) spacing 9 DQ E Skew Length Mismatch 100 Mils (1) Series terminator, if used, should be located closest to LPDDR. (2) Center to center spacing is allowed to fall to minimum (w) for up to 500 mils of routed length to accommodate BGA escape and routing congestion. (3) Center to center spacing is allowed to fall to minimum (w) for up to 500 mils of routed length to accommodate BGA escape and routing congestion. (4) DQLM is the longest Manhattan distance of the DQS and DQ net classes. 184 TIMING REQUIREMENTS AND SWITCHING CHARACTERISTICS Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: OMAP3530 OMAP3525 |
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